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' HARVESTER.

Patented Aug. 29, 1882.

(No Model.)

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S.`D. LOOKE.

HARVESTER.

No. 263,545. Patented Aug. 29, 1882.

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UNTTen STATES PnTaNT @tarea SYLVANUS D. LOGKE, OF HOOSICK FALLS, NEW YORK.

HA RVESTE R.

SPECIFICATION' forming part of Letters Patent No. 263,545, dated August 29, 1882.

Application tiled May 18, 1882. (No model.)

To all whom 'it may concern Beit known that I, SYLvANUs D. LooKn, of Hoosick Falls, in the county of Rensselaer and State ot'New York, have invented certain new and usef'ul Improvements in Harvesters, of which the following is a specification.

My invention relates to the mechanism for adjusting the main wheel in that type ot' harvesters commonly known as the Marsh, wherein said wheelis arrangedin the space beneath an elevator, orin other harvesters where the wheel is capable ot' being similarly sup ported.

The most approved mode of' adjusting this wheel heretofore has been to mount it loosely upon a short axle, carrying` near its ends fast pinions, which engage with the teeth of segment-rack standards fixed tothe side pieces of' the wheel-frame, and having their racks described upon a curve concentric with the axis of the prime pinion. By rotating this axleand then (logging or otherwise stopping it in position the harvester-fratrie is lifted or depressed and held in the desired adjustment.

In the present instance I mount the wheel in said manner-that is, it turns loosely upon a short axle having` fast pinions near its ends which take into segment-rack standards upon the side pieces of the wheel-frame, and are steadied and held in engagement by the extreme projecting ends of the axle moving in guideways in said standards. The teeth of the pinions, moreover, are not out entirely through, although they may be if other provisions are adopted 5 but a web is left at the inner side of each which abuts againstthecontiguous face of the corresponding rack to hold the axle against endwise displacement. Thus f'ar the parts are old and well known.

To the axle, between the main wheel and one of the pinions7 I affix aworm-wlieel,into which meshes a worm or endless screw upon one end ofa rod orshaft suitablysupported in bearings sleeved to the axle, and at the other end provided with a crank or hand-wheel, Iand confined and guided in a loose-fitting eye-bracket from the frame-work. For compactness and stability l form the worm-wheel as a part of, and a flaring or dish-shaped offset from, theadjacent pinion, and in the recess thus obtained protion, partly in section, of a main wheel and wheel frame, and a portion of the elevatorframe with my adjusting devices. Fig. 2 is a rear elevation thereof, also partly in section Fig. 3, a side elevation of one of the segmentstandaxds,formed with a bearing furthe primepinion shaft; and Fig. 4, adetail of the axle and the parts immediately mounted thereon.

A represents the main longitudinal sills of the harvester-frame; B, the transverse bars forming the side pieces of the wheel-frame, and C the rear struts of the elevator-frame.

To the bars B are bolted the segment-stainlards D, having racks d and guideways d for the extreme ends of the axle, and otherwiseot the usual construction, except that at the crown they are provided with mudshields d2, projecting out beyond the racks, so as to overhang, cover,and protect them and thepinions traveling therein.

E is the main wheel, mounted loosely upon the short axle F, and driving, by means of the internal gear, e, the prime pinion e', which coilveys motion to the othermoving parts of the harvester. Near the ends ot' the axle are keyed or riveted pinions G, the teeth of' which are preferably cnt only partially through from the outer side toward the inner, thus leaving a web, g, which abuts against the contiguous surface of the racks in which thepinions travel and prevents end wise motion of the axle. The extreme ends of the axle are turned down, as at 'f, to fit into the gnideways in the segmentstandards and hold the pinions in mesh with the racks. The shoulders thus formed in the axle may, if desired, take up the entire endwise thrust by their abutment againstthe body of the standards, enabling ordinary pinionsto be used, or may re-enforoe the action of the webs in those I have described.

ICO

. harvesterframe, as the case maybe.

A worm-wheel, H, either separate or cast with one ot' the pinions, is madefast-to the axle between the main wheel and one of the segment-standards, and inside that pinion which it adjoins, or of the body of which it forms an integral part. Preferably, both for economy of structure and eompaetness and strength of build, it is castsolid with said pinion, and dishes or flares therefrom toward the main wheel. Within the recess thus gained,and extending from the inner face of the pinion to the hub of the main wheel, steadying thelatter against lateral play, and being steadied itself by the length of bearing thusall'orded,istltted the sleeve or hub yi of a bracket-arm, Lhaving two bearing-boxes, @Vifthe t'ormernear tothe axle and wornrwheel, and thc latter at a considerable distance tl erelrom. rI'hese boxes are arranged in such line that the inner end ot' a rod or shaft, 1C, mounted therein will be brought directly over the worm-wheel, andthe threads ot'an endless screw or worm, 7u, pinned fast upon said end will engage with the teeth of said wheel. Near its outer end the rod K passes loosely through an eye in a bracket or hanger, l.:,depending from the inner elevatorstrnt, or elsewhere attached, according to the location ofthe seat, to bring it within reach of the driver, and beyond this is fitted with a crank, 7a2, or a hand-wheel, whereby it may be turned.

A shield, i3, east as a part of or otherwise secured to the brzwket-arm, rises above and overhangs, so as to cover and protect the worm and adjacent bearing-box and incidentally the worm-wheel, thus keeping said parts clean and sheltered from mnd or debris.

lVhcnever the rod or shaftis rotated the axle will be turned through the medium ot' worm and worm-wheel,and its pinions will be driven up or down the racks, lowering or raising the In such movement the shaft will be permitted the necessary changes ot' angle and endwise play to accommodate itself to the varying relations of the axle and the frame by' its loose-titting guide-eye. lhen the shaft is at rest the frictional contact between worm aiulworm-wheel will be sutlieient to prevent theaxle from turning, thus holding the l1arrester-frame in its adj usted position.

I claiml. rlhe combination of the main wheel, its axle, pinions fast to the ends of said axle, the segment-standards upon the wheel-frame,hav ing racks in which said pinions travel, the worin-wheel, also fast to lthe axle, the worm or endless screw meshing therewith, the crankrod which carries said worm, bearings sleeved to the axle to support said rod, and the guideeye fitting loosely the outer end of the rod and supporting it in position to be reached by the driver in his seat.

2. In combination with the worm-wheelfast to the axle, the worm meshing therewith, the crank-rod which carries and turns said worm, and the long bracket-arm, sleeved t'o the axle and having bearingboxes for the crank-rod, one near to the axle and the other at a distance therefrom,toinsurc the rod againstbnding.

b. In combination with the worin-wheel fast to the axle, and the worm and crank-rod by which it is operated, the guard orshield covering said worm and wheel to protect them from mud or debris.

et. In combination with the worm-wheel fast to the axle, and the worin and crank-rod by which it is operated, the bracket-arm sleeved to the axle, provided with bearingboxes for the crank-rml, and with a guard or shield eovering and protecting the worm above the wormwheel.

5. In combination with the main wheel and with the axle and its fast pinions traveling in racks upon the fraaie, the dished worm-wheel flaring inwardly toward the hub of the main wheel, and a bracket-arm provided with an elongated sleeve or hub iitting over the axle in the recess between the hub ot' the wormwheel and the hub of the main wheel,and carrying abearing box or boxes for the crankrod.

6. The worm-wheel formed integra-l with and as a dished or Haring offset from one ot' the axle-pinions, as and for the purpose described.

7. rlhe bracket-arm having cast integral therewithasleeve to take over the axle, a bearing` box or boxes t'or the crank-rod,aud a shield to cover and protect the worm and worm-wheel.

SYLVANUS D. LOOKE.

Vitnesses:

J. l-tUssnLL PARsoNs, WM. M. ARCHIBALD.

IOO 

